I just ran Software Update and installed the latest Security Update 2005-009. I normally install Security Updates pretty soon after they come out, but this one is especially important since it has 4 patches for Safari.
The last patch actually applies to any app using WebKit, of which there are too many to name. WebnoteHappy Lite doesn’t use WebKit, though my original builds used to.
Anyways, go run Software Update and you’ll feel (and be) safer.